<div class="help-panel" ng-class="{'open': openHelp}">
  <button class="open" ng-click="openHelp=true"><span class="fa fa-question-circle"></span></button>
  <button class="close" ng-click="openHelp=false"><span class="fa fa-times-circle"></span></button>
  <div class="content" ng-transclude></div>
</div>
